Just about obsolete by today's standards.
That may be part of their motivation. Their hardware is only going to get worse for them in the future. They may see this as now or never.
Nk is counting on obambi to replace NK tanks with new ones and rebuild NK like we are doing to iraq.
Which is different from any point in the last 5 decades how?
The North Koreans know their day in the sun, conventional arms wise, passed long ago, and the only existential threat their military can pose is against their own people.
Hence their drive to build nuclear weapons - they recognize nukes are about the only thing which will give their continual sabre rattling any semblance of relevance.